Traffic Light controller using 8051 Micro-controller in Assembly language programming

This is the mini project based on the 8051 microcontrollers and simulation of it in Proteus software using the MCU 8051 IDE. You can see the simulation diagram below and the video demonstrate the procedure for the simulation of traffic light controller.

https://www.youtube.com/watch?v=DjuURyd5Tao

Circuit diagram:

Source code:
ORG 00H
MOV P2,#00H
MOV P3,#00H
MAIN:
     SETB P2.2
     SETB P3.2
     SETB P2.3
     SETB P3.3
     ACALL DELAY1
     SETB P2.4
     SETB P3.4
     CLR P2.3
     CLR P3.3
     ACALL DELAY2
     MOV P2,#00H
     MOV P3,#00H
 
     SETB P2.5
     SETB P3.5
     SETB P2.0
     SETB P3.0
     ACALL DELAY1
     SETB P2.1
     SETB P3.1
     CLR P2.0
     CLR P3.0
     ACALL DELAY2
     MOV P2,#00H
     MOV P3,#00H
     SJMP MAIN
DELAY1: MOV R0,#255D
    H1: MOV R1,#255D
    H2: MOV R2,#71D
    H3: DJNZ R2,H3
        DJNZ R1,H2
        DJNZ R0,H1
    RET
DELAY2: MOV R0,#255D
    H4: MOV R1,#142D
    H5: MOV R2,#51D
    H6: DJNZ R2,H6
        DJNZ R1, H5
        DJNZ R0, H4
    RET
END
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